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Description

Using a candle, some water and a glass, extinguish a candle.

Resources

Water
Saucer
Candle
Matches / Lighter
Food colouring (optional)

Instructions

https://www.youtube.com/watch?v=uk9mDIoKKdQ

The rising water experiment demonstrates how changes in air temperature and pressure can move liquids. When a glass is placed over a burning candle in a tray of water, the water is eventually "sucked" up into the glass.

How it Works

Heating: The candle flame heats the air inside the glass, causing it to expand. Some air may even escape as bubbles from the bottom.
Oxygen Depletion: As the candle burns, it consumes oxygen and releases carbon dioxide and water vapour.
Cooling: Once the oxygen is used up, the flame goes out. The air inside the glass cools down rapidly.
Pressure Drop: Cool air takes up less space than hot air, creating a partial vacuum (lower pressure) inside the glass. The higher atmospheric pressure outside pushes the water into the glass until the pressure is equalized.

Tags

• candles
• experiment
• Matches
• water

Badge Links

• Experiment - Experiment